This model is discontinued
AirTAC has phased out the SI series. You can still order this code here: we ship the direct replacement SAI125X160H, with the same bore, stroke, output force, port and mounting, so it fits the same application. The SAI replacement keeps the same ISO 15552 mounting interface, bore, stroke, output force and accessories, so it drops straight into existing fixtures. It is the current-production version of this cylinder with an upgraded piston seal.
Airtac SI125 Standard Cylinder SI125X160H
The AirTAC SI125 Standard Cylinder SI125X160H is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø125mm bore and 160mm stroke, G1/2 air ports and adjustable end cushioning. This model is discontinued — the direct replacement is the SAI125X160H, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ125 mm
- Stroke160 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM27×2.0
- StatusDiscontinued → SAI125X160H
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SI125 Standard Cylinder SI125X160H
The AirTAC SI125X160H is a discontinued double-acting ISO 15552 profile cylinder with a 125 mm bore and 160 mm stroke. Built for high-temperature duty, the H designation specifies a Viton FKM seal rated for 0 to 150 C. Delivering 6136 N push force at 0.5 MPa, it features a 32 mm rod, M27x2 thread, G1/2 port, and 40 mm adjustable cushions. The direct replacement is the SAI125X160H, matching the exact ISO 15552 mounting interface, bore, stroke, output force, and port size.
The SAI125X160H upgrade introduces a two Y-shaped one-way piston seal for low start-up pressure and extended life. Note this non-magnetic SKU cannot accept a sensor. The SAI family also adds SAIL lock, SAIF valve, and BSAI clamp-lock variants the legacy SI lacked.
Airtac SI125 Standard Cylinder SI125X160H Technical Specifications
| Model | Airtac SI125 Standard Cylinder SI125X160H |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | SAI125X160H |
| Bore size | Ø125 mm |
| Stroke | 160 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M27×2.0 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 500 mm/s |
| Cushion | Adjustable, 40 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The SAI125X160H carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø125mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | — |
| Max (@1.0 MPa) | 1251 kgf | |
The SAI125X160H produces the same force from the same bore. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac SI125 Standard Cylinder SI125X160H
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 125 | Bore size in mm. |
| ×160 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Legacy SI-family variants: SID (double rod), SIJ (adjustable stroke) — each maps to its SAI equivalent (SID→SAID, SIJ→SAIJ). Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B).
Where the Airtac SI125 Standard Cylinder SI125X160H Is Used
High-Temperature Pressing
Applies 6136 N of force at 0.5 MPa for seating components in heated molds, utilizing the Viton H seal to withstand 0 to 150 C ambient heat.
Heavy-Duty Forming
Delivers up to 11045 N push force at 0.9 MPa for metal bending or stamping operations, relying on the 40 mm adjustable cushions to absorb shock.
Replacing the Airtac SI125 Standard Cylinder SI125X160H with the SAI125X160H
To replace the discontinued SI125X160H, order the SAI125X160H. Verify the ISO 15552 mounting interface, 125 mm bore, 160 mm stroke, G1/2 port (PT/G/NPT thread), Viton H high-temp seal, and your specific mounting accessory. Sizing both ways: a 100 mm bore yields 3927 N push at 0.5 MPa, while a 160 mm bore yields 10053 N. Because this stroke is 160 mm, ensure adequate guide support to prevent rod-bending side loads. A plain cylinder does not hold load without live air; the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant.
Replacement checklist
- ✓ Same ISO 15552 interface → SAI125X160H
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac SI125 Standard Cylinder SI125X160H FAQ
Yes, the SI125X160H is discontinued. The direct replacement is the SAI125X160H. It is dimensionally interchangeable per ISO 15552, maintaining the same bore, stroke, force, G1/2 port, and mounting interface.
The G1/2 port bore delivers 6136 N push and 5734 N pull at 0.5 MPa, 8590 N push at 0.7 MPa, 11045 N push at 0.9 MPa, and a theoretical maximum of 1251 kgf at 1.0 MPa. It operates at 30-500 mm/s.
Related AirTAC SAI Cylinders
Request a Quote for the SAI125X160H
Send us the quantity and destination. We confirm price, stock and lead time on the SAI125X160H replacement — usually within 7-8 hours.